Signal distribution system

Claim 1

A CLOSED CIRCUIT TELEVISION SYSTEM COMPRISING A MULTIPLICITY OF LENGTHS OF COAXIAL CABLE, A PLURALITY OF RECEPTACLES ATTACHED TO SAID LENGTHS OF CABLE WITH EACH OF SAID RECEPTACLES BEING ATTACHED TO THE ENDS OF TWO CABLE LENGHTS TO FORM A TRANSMISSION LINE, A PLURALITY OF JACKS ARRANGED FOR ELECTRICAL CONNECTION TO SAID RECEPTACLES, EACH OF SAID RECEPTACLES INCLUDING A PLURALITY OF FIRST COAXIAL CONTACTS CONNECTED TO THE ENDS OF THE RESPECTIVE LENGTHS OF CABLE, EACH OF SAID JACKS INCLUDING A PLURALITY OF SECOND COAXIAL CONTACTS ADAPTED TO BE CONNECTED TO AND DISCONNECTED FROM SAID FIRST CONTACTS, AND AN ELECTRICAL CIRCUIT, SAID JACKS BEING OF AT LEAST TWO TYPES, SAID ELECTRICAL CIRCUIT OF EACH OF A FIRST TYPE OF SAID JACKS INCLUDING MEANS CONNECTED BETWEEN SAID SECOND CONTACTS FOR PROVIDING A CABLE CONTINUATION OVER SUBSTANTIALLY THE ENTIRE RANGE OF FREQUENCIES THAT MAY BE TRANSMITTED BY SAID CABLE, EACH OF SAID CIRCUITS OF CERTAIN ONES OF SAID FIRST TYPE OF JACKS INCLUDING MEAND FOR TAPPING OFF OR INSERTING SIGNALS, SAID CIRCUIT OF A SECOND TYPE OF SAID JACKS INCLUDING MEANS FOR BLOCKING SIGNAL TRANSMISSION BETWEEN SAID SECOND CONTACTS AT LEAST OVER A LIMITED RANGE OF CERTAIN VIDEO FREQUENCIES, SEPARATE MEANS FOR SUPPLYING DIFFERENT VIDEO SIGNALS TO A PLURALITY OF SAID FIRST JACKS, AND MEANS CONNECTED TO A PLURALITY OF SAID FIRST JACKS FOR DISPLAYING CERTAIN SIGNALS RECEIVED THEREAT, AT LEAST ONE OF SAID SECOND JACKS BEING CONNECTED TO THE CABLE RECEPTACLES BETWEEN SAID SEPARATE VIDEO SUPPLYING MEANS SO AS TO PREVENT INTERFERENCE BETWEEN THE DIFFERENT VIDEO SIGNALS IN DIFFERENT PORTIONS OF SAID CABLE.